FEIN means Federal Employer Identification Number. It is a unique number assigned to every business in the United States by the Internal Revenue Service (IRS).
It’s essentially an ID number used by the IRS to record your federal tax payments. Your FEIN goes on all your tax returns and can be used for banking and legal purposes too.
Generally, all business entities need a FEIN to operate in the country. However, if your business is made up of one person, you can use your Social Security Number instead. You may also see it referred to as an EIN, employer identification number, or business tax ID.
You can get your FEIN for free from this IRS website: